DG Hisham is just conservative public health wise.

Last year he opposed Sabah election and the lack of quarantine order
sos

last year, he said would have done 2-weeks genuine full lockdown to stop 3rd wave
sos

in recent months,  he wanted  lockdown, especially on businesses and factories.
sos

So advicing to postpone Parliament for 14 days after 78 people are confirmed positive is consistent with his past positions

politicians from both sides dont listen to all his advices. if situation improves, politicians will try to take credit.  but if shit gets worse, they will blame DG/KKM (like Azmin's former aide)